Split-screen on PC

New Super Mario Bros. Multiplayer

Up to 10 players on one PC, with controllers, keyboard and mouse or several keyboards and mice.

10Verified handler

Handler “NSMB-MarioVsLuigi” by Talos91, version 1

P4+6 more players

What works

With Nucleus Co-op, up to 10 players can play New Super Mario Bros. Multiplayer together on one PC, each in their own part of the screen, with controllers, keyboard and mouse or several keyboards and mice. The free community handler “NSMB-MarioVsLuigi” by Talos91 does the setup and was checked by hub moderators: version 1, updated 31 Dec 2022. New Super Mario Bros. Multiplayer is a platformer and arcade game from 2025.

Players10
ControllersSupported
Keyboard and mouseSupported
Several keyboards and miceOne per player
Hub moderatorsVerified

How to play New Super Mario Bros. Multiplayer split screen on PC

Get Nucleus Co-op
Download Nucleus Co-op, free for Windows 10 and 11, and unzip it into its own folder, for example C:\NucleusCo-op. There is no installer.
Keep it out of Program Files, your user folder and OneDrive.
Download Nucleus Co-op
Install the New Super Mario Bros. Multiplayer handler
In Nucleus Co-op, search the Hub for New Super Mario Bros. Multiplayer and install its handler, or download the handler file from this page and drop it on the Nucleus window. Then show Nucleus where New Super Mario Bros. Multiplayer is installed.
Download the handler file (.nc)
Take a seat
Each player presses a button on their own controller to join and takes a spot on the screen. Pick a layout that fits your players.
Playing with several keyboards and mice? Press End once everything is in place to give each window its own cursor.
Launch and connect
Press Launch: Nucleus opens one copy of New Super Mario Bros. Multiplayer per player and lays the windows out on your screen. Then link them in game, usually one player hosts a LAN or online session and the others join it. The handler notes say how.

What you need

A Windows 10 or 11 PC
Nucleus Co-op runs on Windows only. System requirements
New Super Mario Bros. Multiplayer for Windows
Installed on that PC. Nucleus starts every player's window from that one install.
Nucleus Co-op, free
With .NET Framework 4.7.2 or later and the Visual C++ 2015–2022 runtimes (x86 and x64). Download
Something to play with
One controller per player, or one keyboard and mouse per player. Controllers · Keyboards and mice
A PC that can run 10 copies
Each player runs their own copy of New Super Mario Bros. Multiplayer, so the PC carries several times the usual load. Lower the graphics settings if it struggles. Performance tips
A multiplayer mode
Nucleus links the windows through the game's own LAN or online mode; the handler takes care of it.

Handler notes

Free remake of the Mario vs. Luigi game mode from New Super Mario Bros DS, get it from here: https://github.com/ipodtouch0218/NSMB-MarioVsLuigi/releases
Split-screen setup guide.
Create a public or private lobby in one instance and join in the others.
If you use keyboards and mice after all the instances have launched, resized and positioned correctly, press the END key once to lock the input for all instances to have their own working cursor and keyboard. You need to left click each mouse to make the emulated cursors appear after locking the input. Press the END key again to unlock the input when you finish playing. You can also use CTRL+Q to close Nucleus and all its instances when the input is unlocked.
Read the FAQ if you have any further questions and want to know more about Nucleus Co-op.
Handler by Talos91. Please support the Nucleus Co-op team if you like my Nucleus handler work.

About New Super Mario Bros. Multiplayer

A unity-standalone 2-10 player remake of the Mario vs. Luigi gamemode from the New Super Mario Bros DS download game. Includes the 5 default levels (Grassland, Bricks, Castle, Pipes, and Ice), along with a handful of custom levels to battle on! All power-ups are included and remain faithful to their original counterparts, along with the new addition of the Propeller Suit & Ice Flower!

Summary from IGDB